In a large bowl, cream the butter, peanut butter and sugars until light and fluffy. Beat in eggs and vanilla. Combine flour and baking soda; gradually add to creamed mixture and mix well. Cover and refrigerate for 1 hour or until easy to handle.,Roll dough into 1-1/4-in. balls. Press a candy bar into each; reshape balls. Place 2 in. apart on ungreased,.,______,In a microwave-safe bowl, melt chocolate candies and shortening; stir until smooth. Drizzle over cookies. Let stand until set.